Star shaped knob



FIG. 1 is a perspective of a star shaped knob showing a screw turned by the knob in phantom;

FIG. 2 is a front end view without illustration of the screw;

FIG. 3 is a right side elevation view thereof, the left side elevation view being a mirror image thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof, undisclosed portions are not part of the claimed design.

The phantom lines in the drawings indicate environmental structure which forms no part of the claimed design. 

The ornamental design for a star shaped knob, as shown and described. 